FURTHER STUDIES OF THE BIOECOLOGY 
OF THE NEW ENGLAND TINGIDAE 
(HETEROPTERA) 1 
By Norman S. Bailey 
Bradford Junior College 
Part III. Seasonal Population Trends of the Walnut 
Lace Bug, Corythuca juglandis (Fitch) 
The area in which this study was made is described generally in 
Part I of this series, where the methods employed are also detailed 
(Bailey, 1963). There are two butternut trees ( Juglans cinerea L.) 
near the Hyatt Avenue boundary of the College land. The smaller 
of the two is only about 20' north of the roadside while the other is 
about 75' from the street and approximately 60' NW of the first 
butternut, which will be referred to as Juglans A. There is a grassy 
field between them. 
Juglans A is only about 20' tall with a low, spreading top. At its 
branch tips on the east is a tall white lilac ( Syringa vulgaris L. var. 
alba West.) with a neglected pear tree ( Pyrus communis L.) just 
beyond. By the roadside there is a red cedar (J uniperus virginiana L.) 
with a mulberry (Morus alba L.) growing beside it. These two trees 
are nearly as tall as Juglans A. Except for these four specimens, 
Juglans A stands in the open surrounded by a field except to the east 
where a tangle of shrubs and rank herbs prevails. The three main 
stems of Juglans A have the heartwood exposed on the west from the 
ground to a height of about ten feet. I have been told that this was 
the result of fire injury that occurred a few years before we moved 
here. In the eight years the tree has been under my observation 
(since the fall of 1956), the bark has grown in some from the sides 
of the wound but the exposed wood is now badly decayed. The some- 
what stunted habit of Juglans A probably is due in part to this severe 
injury and to the heavy annual infestation by Corythuca juglandis 
(Fitch). Except on the west side, the lower branches are easily 
reached, making collecting convenient. 
The second butternut, Juglans B, is tall and apparently vigorous. 
By estimate, its height is about 35' and it dominates spreading ash- 
^Acknowledgment is gratefully made of a Sigma Xi — RESA Research 
Fund Grant and Grant No. G5477 from the National Science Foundation 
which made this series of studies possible. 
Manuscript received by the editor April 14, 1964. 
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